If you have been following TCR for very long, you have probably noticed a constant focus on spraying at lower pressures. The new series of Graco RAC X Fine Finish Low Pressure tips are a compelling and EASY step in that direction.
Controlling airborne mist and overspray does two things for us. First, it makes the working environment safer – we are less likely to wear and breathe the material we are spraying. Second, there is less contamination settling into finishes as they dry.
HOW you get there is a function of more variables. Flaws in technique cause overspray, no matter how good the machine is…it is only as efficient as the operator.
Product and pressure also come into play, regardless of whether you are spraying airless, air assisted or HVLP. In the end, you need a good, clean finish.
Running too high with fluid pressure is the most common mistake we see when training painters. Crank it up and go fast. When more fluid is pumped and atomized, you have to move faster. This can create mistakes that cause overspray and contamination.
Slow Down to Go Faster
Fine Finish Low Pressure tips (or FF LP) are engineered to allow us to work with our pumps set at lower pressures. Using airless, it is expected that you will be able to cut pressure in as much as half using a low pressure tip. With air assisted, we have already consistently observed 25-30% reduction in fluid pressures with medium viscosity latexes.
One big benefit is that lower pressures are easier on your pump. If your machine is working at lower pressure, it is not working as hard. Material usage will be reduced because of better transfer efficiency. The fine finish low pressure tips should also last longer than a regular tip.
Your production rates will not change, you won’t go slower. You can still choose the same size orifice for the product you are going to spray, you will be able to do it cleaner and just as fast – the only difference will be that you are doing it at a lower pressure. This is an easy move toward efficiency in spraying.
To learn more about RAC X Fine Finish Low Pressure tips, visit Graco’s site.
Have you tried them yet? Share your thoughts below…